media-libs/urt: fix parallel, mark as LTO and strict-aliasing unsafe

Closes: https://bugs.gentoo.org/970475
Signed-off-by: Nicolas PARLANT <nicolas.parlant@parhuet.fr>
Part-of: https://codeberg.org/gentoo/gentoo/pulls/643
Merges: https://codeberg.org/gentoo/gentoo/pulls/643
Signed-off-by: Sam James <sam@gentoo.org>

media-libs/urt/files/urt-3.2_rc1_p20250101-parallel.patch

@@ -0,0 +1,14 @@
+see PR pending https://github.com/sarnold/urt/pull/14.patch
+https://bugs.gentoo.org/970475
+ensure buildlib (static) is built before buildshared
+--- a/lib/makefile.src
++++ b/lib/makefile.src
+@@ -75,7 +75,7 @@ install: buildlib
+ 
+ # Rebuild the library from all the .o files.
+ 
+-buildshared: $(OBJS)
++buildshared: buildlib $(OBJS)
+ 	$(CC) ${CFLAGS} ${LDFLAGS} -o $(SHARED) $(OBJS) $(LIBS) -shared -Wl,-soname,$(SONAME)
+ 	ln -sf $(SHARED) $(LDNAME)
+ 	ln -sf $(SHARED) $(SONAME)

media-libs/urt/urt-3.2_rc1_p20250101.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2025 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -29,6 +29,9 @@ DEPEND="
 "
 
 PATCHES=(
+	"${FILESDIR}"/${PN}-3.2_rc1_p20250101-parallel.patch
+
+	# both merged
 	"${FILESDIR}"/${P}-respect-ldflags.patch
 	"${FILESDIR}"/${P}-ar.patch
 )
@@ -44,6 +47,12 @@ src_prepare() {
 }
 
 src_configure() {
+	# -Werror=strict-aliasing
+	# https://github.com/sarnold/urt/issues/15
+	# Do not trust with LTO either.
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	append-cflags -fPIC
 
 	sed -i -e '/^CFLAGS/s: -O2 : :' makefile.hdr || die